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Note 1 - Summary of Business and Significant Accounting Policies (Detail) - Summary of useful lives used in computing depreciation and amortization: | 12 Months Ended
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Dec. 31, 2012
Life 39 Years [Member] | Building [Member] |
Property, plant, and equipment useful lives | 39
Life 5-15 Years [Member] | Construction Equipment [Member] | Minimum [Member] |
Property, plant, and equipment useful lives | 5
Life 5-15 Years [Member] | Construction Equipment [Member] |
Property, plant, and equipment useful lives | 15
Life 5-15 Years [Member] | Land Improvements [Member] | Minimum [Member] |
Property, plant, and equipment useful lives | 5
Life 5-15 Years [Member] | Land Improvements [Member] |
Property, plant, and equipment useful lives | 15
Life 3-10 Years [Member] | Furniture and Fixtures [Member] | Minimum [Member] |
Property, plant, and equipment useful lives | 3
Life 3-10 Years [Member] | Furniture and Fixtures [Member] |
Property, plant, and equipment useful lives | 10
Life 5 Years [Member] | Other Transportation Equipment [Member] |
Property, plant, and equipment useful lives | 5

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- Definition No authoritative reference available. + References No definition available. + Details
Name: | us-gaap_PropertyPlantAndEquipmentEstimatedUsefulLives
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration